<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <script type="text/javascript" src="jquery-2.1.4.js"></script>
    <script type="text/javascript" src="StartShow2.js"></script>
    <style type="text/css">
    .main{
        height: 500px;
        width: 500px;
        border:2px red solid;
        background-color: yellow;
    }
    </style>
    <script type="text/javascript">
        function xx(){
            var x=$(".main");
            Start.set(x);
         }
   </script>
</head>
<body>
   <div class="main" onclick="xx()">
   </div>
</body>
</html>